Meaning of -ON in English

-ON

I. noun suffix

Etymology: International Scientific Vocabulary, alteration of -one

: chemical compound not a ketone or other oxo compound

parathi on

II. noun suffix

Etymology: from -on (in ion )

1. : subatomic particle

nucle on

2.

a. : unit : quantum

phot on

magnet on

b. : basic hereditary component

cistr on

oper on

III. noun suffix

Etymology: New Latin, from -on (in argon )

: noble gas

rad on

Merriam-Webster's Collegiate English vocabulary.      Энциклопедический словарь английского языка Merriam Webster.